SNLS643C March 2019 – April 2024 DS90UB953A-Q1
PRODUCTION DATA
The Serializer has a PDB input pin to ENABLE or POWER DOWN the device. This pin can be controlled by an external device, or through VDD where VDD = 1.71V to 1.89V. PDB can be brought high after all power supplies on the board have stabilized.
When PDB is driven low, make sure that the pin is driven to 0V for at least 3ms before releasing or driving high. In the case where PDB is pulled up to VDD directly, a 10kΩ pullup resistor and a > 10μF capacitor to ground are required.
Toggling PDB low powers down the device and resets all control registers to default. After power up, if there are any errors seen, TI recommends clearing the registers to reset the errors.
Make sure to power up the VDDDRV before or at the same time as the VDDPLL.